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ok

Let me do it on paper first. I think it would be murder typing it out.

haha thank you! any help will go a long way

i'll continue to try draw something out of my mess of numbers and letters while i wait

i also figured that the derivative operator 'D' helps so that the LHS = (D^2 + 7D +12)y

You do mean e^{-3x}, don't you?

yes! sorry typo

When I get to factors that need expanding, I'm going to get Mathematica to do that (save time).

ok no worries. if i dont follow il just let u know

So what happened, your lecturer just dump theory on you with no demonstration?

Not trained to teach...

just give me a fan point and i'll be happy

wow thanks! im just gona go through it and check i understand.. haha ok sure how do i do that?

just click my 'become a fan' link...if there isn't one there, refresh the page...should work then

ps. is there a place to download mathmatica for free? ok right on it

fanned. thanks a million! will i still be able to ask help from you if i have any more troubles..

woops...no it's not...wait.

haha! i was like crap.. i did notttttt get that

http://www.wolframalpha.com/input/?i=y%27%27%2B7y%27%2B12y+%3D+2e^%28-3%29cos%282x%29

graphs in the correct version*

ah...typo...

So, am I right in understanding you've finished deriving the solution?

And you're reading off that and not Wolfram?

Yes, I get an e-mail if you respond to a thread I've been in.
Are you fine to derive the rest?

yep me too. 1:22am. ok do u recommend anyone else?

I don't know the particular skill level of people on here. You may have to post and cross fingers.

Is this an assignment due tomorrow or something?

Anyways, good luck. I seriously have to hit the sack.

thanks you are a hero! night!